A single-composition CaSi2O2N2:RE (RE=Ce3+/Tb3+, Eu2+, Mn2+) phosphor nanofiber mat: Energy transfer, luminescence and tunable color properties

CIE chromaticity coordinates of CaSi2O2N2:Ce3+/Tb3+, Eu2+, Mn2+ samples. The lighting optical images with a drive current of 100 mA: three LEDs with nanofiber mats of CaSi2O2N2: 0.02Ce3+, 0.03Tb3+(b), CaSi2O2N2: 0.02Ce3+, 0.01Eu2+(c) and CaSi2O2N2: 0.02Ce3+, 0.12Mn2+(d).225